TFA CO2 breadboard case for ESP32 Thing Plus or similar.
thingiverse
This is a adapted version from https://www.thingiverse.com/thing:4225732 I made it to use a full breadboard for experimenting with ESP32 Thing Plus from Sparkfun. https://www.sparkfun.com/products/15663 I use it with a adapted arduino code to send MQTT to my MQTT broker. I also added OTA so you do not have to use the USB connector. With this build you get very cheap CO2 wireless sensor about 85 EUR. And you can also add more sensors as example for humidity. I had to add a resistor of about 3.3 kOhm so the ESP32 did not reset. On the TFA CO2 sensor you have to add one header pin. for the 5V power supply. Feel free to use it.
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